Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Substrate-induced reduction of graphene thermal conductivity. / Koniakhin, S. V.; Utesov, O. I.; Terterov, I. N.; Nalitov, A. V.
в: Physical Review B, Том 95, № 4, 045418, 23.01.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Substrate-induced reduction of graphene thermal conductivity
AU - Koniakhin, S. V.
AU - Utesov, O. I.
AU - Terterov, I. N.
AU - Nalitov, A. V.
PY - 2017/1/23
Y1 - 2017/1/23
N2 - We develop a theory of heat conductivity in supported graphene, accounting for coherent phonon scattering on disorder induced by an amorphous substrate. We derive spectra for in-plane and out-of-plane phonons in the framework of Green's function approach. The energy parameters of the theory are obtained using molecular dynamics simulations for graphene on a SiO2 substrate. The heat conductivity is calculated by the Boltzmann transport equation. We find that the interaction with the substrate drastically reduces the phonon lifetime and completely suppresses the contribution of flexural (ZA) phonons to the heat conductivity. As a result, the total heat conductivity is reduced by several times, which matches with the tendency observed in the available experimental data. The considered effect is important for managing the thermal properties of graphene-based electronic devices.
AB - We develop a theory of heat conductivity in supported graphene, accounting for coherent phonon scattering on disorder induced by an amorphous substrate. We derive spectra for in-plane and out-of-plane phonons in the framework of Green's function approach. The energy parameters of the theory are obtained using molecular dynamics simulations for graphene on a SiO2 substrate. The heat conductivity is calculated by the Boltzmann transport equation. We find that the interaction with the substrate drastically reduces the phonon lifetime and completely suppresses the contribution of flexural (ZA) phonons to the heat conductivity. As a result, the total heat conductivity is reduced by several times, which matches with the tendency observed in the available experimental data. The considered effect is important for managing the thermal properties of graphene-based electronic devices.
UR - http://www.scopus.com/inward/record.url?scp=85010749045&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.95.045418
DO - 10.1103/PhysRevB.95.045418
M3 - Article
AN - SCOPUS:85010749045
VL - 95
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 4
M1 - 045418
ER -
ID: 49950405